Reflector for Android turns your Android device into an AirPlay receiver that will display content sent from an iOS device or a computer running AirParrot. It is meant to receive signals, not transmit them. Reflector for Android is available in the Google Play Store.
If you wish to send the screen from an Android device to a computer, then Reflector 2 for Mac or PC will be needed. Reflector 2 will allow the computer to receive screen casting sent from an Android device running version 4.4.2 or later. More details on how to connect your Android device to Reflector 2 can be found here: How do I cast my Android with Google Home?